Pitch shifting using the "ocean" algorithm. This bouncelets gives the best results with rich polyphonic musics,
but quite poor results with simple tones. Result is quite good with voices though.
<p>
Note that this pitch shifter does not preserve the formants. As a result, pitch shifted voices do not sound
natural. Use <i>pitchshift-voice</i> instead for a formant-preserving pitch shifter.
<p>
For a pitch shifter of lower latency (but higher CPU usage),
try <i>audio.effect.wave.pitch.pitchshift-roll</i>.